hòa tan hoàn toàn 1 lượng kim loại sắt bằng 1 lượng dung dịch h2so4 0,8M vừa đủ, sau khi kết thúc phản ứng thì thu được 5,6 lít khí đktc. a, tính số gam sắt bị hòa tan b,tính thể tích dung dịch h2so4 đã tham gia pư c,tính nồng độ mol dd thu đc sau pư

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I 1. We have to test these products. + These products 2. People don't use this dictionary very often. → This dictionary .... 3. Someone gave Mary this hat an hour ago. → Mary .... 4. They told me that our teacher was sick. I..... 5. We must finish our project on time. Our project 6. People can find a cure for cancer in the future. → 7. They ought to knock down the old building → 8. Alexander Bell invented the telephone→ 9. Shakespeare wrote that play. 10. They speak French in France. 11. You must do this exercise carefully. 12. Her mother doesn't cook a meal in the kitchen. → 13. Does Nam visit the school the library everyday? → 14. No one answer the question yesterday. → 15.Did they decorate the living room? II. Fill in the blank with a suitable word in the box. fit , ride, spend, for , from, tired , exercise , energy , calorie We need calories or (1) _to do the things every day. For example, when we walk or (2)_ _a bike to school, we spend a certain amount of (3)_ _and even when we sleep, we also use them. But how many calories should we (4)_ day to stay in shape? It's difficult (5) us to calculate. If people want to keep 6). _,they should remember that everyone should have between 1600 and 2500 calories a day. We get calories (7)_the food we eat. If we get too much food and don't take part (8)_ _any activities, we can get fat quickly. So besides studying, we should do some (9) _play sports or do the housework, such as cleaning the floor, cooking etc., if we don't eat enough, we feel (10)_ _and weak.